When todays Reference 4100 - the third iteration of AP’s iconic sports watch - was launched in 1977, it was the first to feature a central seconds hand and, at 35mm, was designed for those who found the jumbo models too big.

This 18k 35mm reference 4100BA is in a condition that will make any collector sweat. The grey petit-tapisserie dial, made by Stern, bears the old-style Audemars Piguet signature and is in fantastic condition. The case has the correct winding crown without the logo. The bracelet is in good condition and fits a wrist of up to 18.5 cm. The watch has the caliber 2123, a modified Jaeger-LeCoultre movement, as is often the case with AP.

Our particular Reference 4100BA features a 35mm solid yellow gold case with a sapphire crystal, an unsigned crown, a polished gold bezel, and a grey colored hobnail dial with a yellow gold 'stick' handset.

- wrist size in our picture is 18cm circumference -

DIAL:

• original never touched grey colored hobnail dial in flawless condition
• original hands, dial & crown
  

BRACELET & CLASP:

• the 18k yellow gold "Royal Oak" bracelet can be worn up to a 18,5 cm wrist / 2.2 mm thick
• original Audemars Piguet clasp

CASE:

• excellent overall condition, showing minor traces of use 
• 3- body 18k yellow gold case with screw down case back
  
• 35 mm (without crown) / 44 mm (lug-to-lug) / 23 mm (bracelet) / 8 mm thick
• Year: 1979
• Ref.: 4100BA
• total weight: 165 g

MOVEMENT:

• Audemars Piguet Cal. 2123 - automatic
• 33 jewels, 28800 A/h, 40 hours power reserve
  
• professionally serviced 05/2025
• +5 sec/d / 300°

BOX & PAPERS:

• comes with a printed version of a digital extract from the archives of Audemars Piguet from March 2024
• GOLDAMMER certificate of authenticity & service documentation card
• GOLDAMMER box

GOLDAMMER REFERENCE: #917